Common Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 Standby Equity Distribution Agreement [Member]	Mar. 29, 2011 Standby Equity Distribution Agreement [Member]
Common stock outstanding owned percentage	10.80%	14.20%
Equity Distribution Agreement, Shares, Maximum Number Authorized to Issue					250,000
Common stock, shares sold					11,466
Gross proceeds from issuance of common stock				$ 97
Payment of commissions to agent pursuant to common stock issue				5
Other miscellaneous expense of common stock issuance				3
Net proceeds from issuance of common stock	$ 0	$ 0	$ 89	$ 89